The two soldiers (Corsicans) who committed a murder and robbery some time since at Neuilly, and were sentenced to death by court-martial, were shot yesterday morning, in presence of a large crowd, at the Polygone of Vincennes. One of them, [Jean-Baptiste] Agostini, was so exhausted that he had to be tied to a post to keep him from falling to the ground. The other, [Jean-Antoine] Ciosi, was more courageous, and, having addressed the shooting party to this effect, — “Dear comrades, on my conscience, I committed the crime for which I die, but I committed no robbery. I ask pardon of God, and of you. Farewell!” he himself gave the word to fire. The troops marched past the bodies as they lay on the ground. The interment took place in the burial ground of Vincennes, under the supervision of the chaplain of the fort.

A longer French-language account of the crime and execution — including the necessity of a brain-splattering coup de grace to complete the sentence — can be found here. There’s some fuzziness with the date cited in different places but French press reports (for instance, from Le Figaro on January 22) unambiguously place it on Monday the 21st.